High-resolution IRCCD images of the Galactic center at 2.2 and 3.5 microns

Details High-resolution IRCCD images of the Galactic center at 2.2 and 3.5 microns High-resolution IRCCD images of the Galactic center at 2.2 and 3.5 microns

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....98..204t&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 98, July 1989, p. 204-216.

Astronomy and Astrophysics

Astronomy

39

Charge Coupled Devices, Galactic Nuclei, Infrared Imagery, Milky Way Galaxy, High Resolution, Interstellar Extinction, Radio Sources (Astronomy), Star Clusters

Scientific paper

An IRCCD camera was used to obtain high-resolution images at 2.2 and 3.5 microns of the Galactic center at subarcsecond resolution. These images show that the compact nonthermal radio source Sgr A-asterisk is not coincident with any part of IRS 16; Sgr A-asterisk is found to be 1.1 + or - 0.3 arcsec west of IRS 16C. At 3.5 microns, IRS 16 is a complex object. IRS 16SW is resolved into two sources, and IRS 16C may be double or extended. From the colors and sizes of the various components, it is difficult to explain these objects as stellar clusters; the required stellar density would be too high. Finally, there is evidence that there is a blue and a red source, separated by about 1 arcsec, for each of the northern arm sources, IRS 1W, IRS 5, and IRS 10.

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